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Document And Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2020
Mar. 01, 2021
Jun. 30, 2020
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2020    
Document Transition Report false    
Entity File Number 1-5005    
Entity Registrant Name INTRICON CORPORATION    
Entity Incorporation, State or Country Code PA    
Entity Tax Identification Number 23-1069060    
Entity Address, Address Line One 1260 Red Fox Road    
Entity Address, City or Town Arden Hills    
Entity Address, State or Province MN    
Entity Address, Postal Zip Code 55112    
City Area Code 651    
Local Phone Number 636-9770    
Title of 12(b) Security Common stock, par value $1.00 per share    
Trading Symbol IIN    
Security Exchange Name NASDAQ    
Amendment Flag false    
Document Fiscal Year Focus 2020    
Document Fiscal Period Focus FY    
Current Fiscal Year End Date --12-31    
Entity Filer Category Accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
Entity Common Stock, Shares Outstanding   8,998,536  
Entity Well-known Seasoned Issuer No    
Entity Current Reporting Status Yes    
Entity Voluntary Filers No    
Entity Public Float     $ 113,106,778
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Interactive Data Current Yes    
Entity Central Index Key 0000088790    
Documents Incorporated by Reference DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Company's definitive proxy statement for the 2021 annual meeting of shareholders are incorporated by reference into Part III of this report; provided, however, that the Audit Committee Report and any other information in such Proxy Statement that is not required to be included in this Annual Report on Form 10-K, shall not be deemed to be incorporated herein or filed for the purposes of the Securities Act of 1933, as amended or the Securities Exchange Act of 1934, as amended.